Search Results: 'Jacobs'

Traylor-Shea to design and build RiverRenew tunnel system
20 November, 2020
US-based AlexRenew – the public utility for water renewal in Alexandria, Virginia – has awarded a US$454.4m contract to Traylor-Shea Joint Venture to design and construct the RiverRenew Tunnel System Project.

Highways England seeks partner for Britain’s longest road tunnel
11 November, 2020
Highways England is inviting tenders for the proposed £2bn (US$2.6bn) Lower Thames Crossing tunnel which will be the longest road tunnel in Britain and the third-largest TBM-bored tunnel in the world.

Up the junction, round the bend
23 October, 2020
While pushing a preformed portal box through an excavation has been done before, a Network Rail project demands that it be done on a curve – and that hugely increases the complexity. Julian Champkin reports

Country barn aims to placate HS2 opponents
24 July, 2020
On the surface, it is a functional, rustic, country barn set back from the road and in harmony with its bucolic setting. A closer inspection reveals not a barn at all but a headhouse for an HS2 tunnel ventilation shaft.

TBMs leaving site on the Sydney Metro project
25 February, 2020
Australia – The four 7m-diameter Herrenknecht double shields that excavated the tunnels for the City & Southwest phase of the Sydney Metro are being lifted out of construction sites and are leaving the city. Between them they have excavated 30km of twin metro tunnel and only the slurry TBM for the harbour crossing remains.

Encountering Pingoes
20 February, 2020
A slurry TBM encountered an unexpected drift filled hollow (DFH) on the Lee Tunnel drive. Three contributors told their part of the story: project geotechnical engineer Tim Newman gave a description of the project and some of the GI undertaken ahead of the drive, tunnel construction manager John Corcoran spoke about tunnel operations and consultant geologist Jackie Skipper about emergency response site team, forensic ground investigation to gauge extent of DFH, what is a DFH and tell-tale signs. Martyn Noak from Jacobs reports

Sydney Metro finishes city centre tunnels
22 January, 2020
Australia – Four out of five drives for the Sydney Metro’s ‘City and Southwest’ phase have been completed. The most recent breakthrough was into Barangaroo Station. These drives represent the entirety of the city centre tunnels, with only a second tube crossing the harbour still to be completed. As of 21 January, some 97% of tunnel excavation had been completed.

City & Southwest
20 January, 2020
Alex Conacher visits the Sydney Metro’s second phase to speak with Terry Sleiman, project director for the contractor John Holland CPB Ghella, Hugh Lawson, project director for the client, and Kate Cole, occupational health and hygiene manager for Transport for NSW